View Compilation Error

0_0_23794918_14526\Main.java:3: 错误: 需要class, interface或enum
public static void main(String[] args) {
              ^
0_0_23794918_14526\Main.java:5: 错误: 需要class, interface或enum
	while (a.hasNext()) {
	^
0_0_23794918_14526\Main.java:7: 错误: 需要class, interface或enum
	System.out.println(i+j);
	^
0_0_23794918_14526\Main.java:8: 错误: 需要class, interface或enum
	}
	^
4 个错误